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| author | Clemens Ladisch <clemens@ladisch.de> | 2009-11-10 10:13:30 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2009-11-10 16:32:20 +0100 |
| commit | e7373b702f6eab35f315e016a4159860a7a4d686 (patch) | |
| tree | 01e2401935c57f80f6b78d1906128f006655b432 /include/sound | |
| parent | 91d12c485b8949cce6c13ab641147c5bc86ce8b9 (diff) | |
| download | linux-rt-e7373b702f6eab35f315e016a4159860a7a4d686.tar.gz | |
sound: pcm: record a substream's owner process
Record the pid of the task that opened a PCM substream. For sound
cards with hardware mixing, this allows determining which process
is associated with a specific substream's volume control.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'include/sound')
| -rw-r--r-- | include/sound/pcm.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/sound/pcm.h b/include/sound/pcm.h index de6d981de5d6..c83a4a79f16b 100644 --- a/include/sound/pcm.h +++ b/include/sound/pcm.h @@ -348,6 +348,8 @@ struct snd_pcm_group { /* keep linked substreams */ int count; }; +struct pid; + struct snd_pcm_substream { struct snd_pcm *pcm; struct snd_pcm_str *pstr; @@ -379,6 +381,7 @@ struct snd_pcm_substream { atomic_t mmap_count; unsigned int f_flags; void (*pcm_release)(struct snd_pcm_substream *); + struct pid *pid; #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) /* -- OSS things -- */ struct snd_pcm_oss_substream oss; |